Journal ArticleDOI
Miniature Interferometer Terminals for Earth Surveying: Ambiguity And Multipath with Global Positioning System
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TLDR
In this paper, the authors proposed a method of ambiguity resolution for short-baseline interferometric observations of GPS, which is suitable for observations made with antennas of low directive gain.Abstract:
With the recent launching of several satellites of the global positioning system (GPS), a variety of schemes based on radio interferometry have been proposed for the accurate determination of relative positions of receiving terminals on the ground. Provided that the integer-cycle ambiguities of the interferometric phase observations can be correctly resolved, the baseline vector extending from the antenna of one terminal to that of another should be determinable with uncertainty much smaller than the 19-cm wavelength of the GPS transmissions. We propose a method of ambiguity resolution that is suitable for observations made with antennas of low directive gain. Such antennas are compact, but the feasibility of their use has been questioned because observations with them are susceptible to multipath interference. For short-baseline interferometric observations of GPS our method yields correct ambiguity resolution despite severe multipath interference and significant sky blockage, even when instability of the frequency standards governing the separate receiving terminals limits the time span of coherent integration to five minutes.read more
Citations
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Journal ArticleDOI
The least-squares ambiguity decorrelation adjustment: a method for fast GPS integer ambiguity estimation
TL;DR: In this article, an ambiguity decorrelation approach is introduced to flatten the typical discontinuity in the GPS-spectrum of ambiguity conditional variances and return new ambiguities that show a dramatic improvement in correlation and precision.
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Journal ArticleDOI
Southern California permanent GPS geodetic array: Error analysis of daily position estimates and site velocities
Jie Zhang,Yehuda Bock,Hadley O. Johnson,Peng Fang,Simon D. P. Williams,Joachim F. Genrich,Shimon Wdowinski,Jeff Behr +7 more
TL;DR: In this paper, the authors analyzed time series of daily positions estimated from data collected by 10 continuously monitoring Global Positioning System (GPS) sites in southern California during the 19-month period between the June 28, 1992 (Mw=7.3), Landers and January 17, 1994 (mw=6.7), Northridge earthquakes.
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Method and system for determining position on a moving platform, such as a ship, using signals from GPS satellites
TL;DR: In this paper, the group delays of the wide bandwidth P code modulations in both the L1 and L2 bands were determined by measuring the phases of carrier waves implicit in the spread-spectrum signals received in both bands.
References
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Journal ArticleDOI
GPS Signal Structure and Performance Characteristics
TL;DR: Gps performance objectives, orbit geometry, and propagation effects are summarized in order to gain better understanding of the signal and what characteristics it must provide.
Journal ArticleDOI
Using the Global Positioning System (GPS) for geodetic positioning
TL;DR: In this paper, the authors reviewed several concepts for utilizing GPS signals and described the reconstructed carrier phase method, which is being pursued by the Defense Mapping Agency, National Oceanic and Atmospheric Administration, and the U.S. Geological Survey.
Journal ArticleDOI
Satellite Emission Radio Interferometric Earth Surveying SERIES-GPS Geodetic System
TL;DR: A great reduction in telecommunications sophistication is possible which will result in an order of magnitude less cost for a SERIES GPS station compared to a quasar based mobile VLBI system.
Journal ArticleDOI
Miniature interferometer terminals for Earth Surveying
TL;DR: In this article, a system of miniature radio interferometer terminals is proposed for the measurement of vector baselines with uncertainties ranging from the millimeter to the centimeter level for baseline lengths ranging, respectively, from a few to a few hundred kilometers.
Journal ArticleDOI
Geodesy by radio interferometry: Determination of a 1.24‐km base line vector with ∼5‐mm repeatability
Alan E. E. Rogers,Curtis A. Knight,Hans F. Hinteregger,Alan R. Whitney,Charles C. Counselman,Irwin I. Shapiro,S. A. Gourevitch,Thomas A. Clark +7 more
TL;DR: In this article, the 1.24-km base line vector between the two antennas of the Haystack Observatory was determined from X band radio interferometric observations of extragalactic sources via a new method that utilizes the precision inherent in fringe phase measurements.